2,4-二乙酰基-3-氧代戊二酸酐 、
4-Aminophenyl benzylcarbamate 以
甲醇 为溶剂,
反应 1.0h,
以to furnish 5-acetyl-3-[1-(p-N-benzylcarbamoyloxyphenylamino)ethylidene]-4-hydroxy-2H-pyran-2,6(3H)-dione, m.p. 195°-197° C.的产率得到5-acetyl-3-[1-(p-N-benzylcarbamoyloxyphenylamino)ethylidene]-4-hydroxy-2H-pyran-2,6(3H)-dione